Switch structure



Feb. 2s, i928.

R. C. DEALE SWITCH STRUCTURE Filed July`l6, 1924 Patented Feb. 28, 1928.

UNITED STATES 1,666,865 PATENT OFFICE.

ROBERT C. DEALE, OF PLAINFIELD, NEVI JERSEY, ASSIGNOR TO NILES-BEMENT-POND COMPANY, OF NEW YORK, N. Y., A CORPORATXON OF NEW JERSEY.

SWITCH STRUCTURE.

Application filed July 1G,

My inventionrelates to switch structures and particularly to switches tor controlling the operation et planers and similar machin tools.

One object of my invention is to provide a new and an improved pilot. switch that shall be simple inconstruction and operation and that shall be adapted 'lor governing the operation ot planer-s and similar machine tools.

another object ot my invention is to provide a switch that shall comprise a number of sets ot stationary contact membersl disposed in circular arrangement and a inmiber ot' movable contact plates each ot which is located between two sets ot contact menibers so that' rotation ot the contact plates in either direction bridges a set oi the contact members.

ln the accompanying drawing:

Figure 1 a plan view, with a portion `otl the cover removed, of a switch constructed in accordance with my invention.

Fig. 2 is a sectional view along the line 2-2 of Fig. 1.

Referring to the drawing, a switch is illustrated comprising a base 1 having a cover 2 secured thereto by means ot bolts 3. The base 1 is secured to a wall ol the machine tool (not shown) by means otL the projecting lugs or legs ll. By so mounting the switch a Vvdistance from the supporting wall, it should be noted that the bolts 3 tor securing the cover 2 to the base are easily withdrawn ior inspection or replacement ot' any part of the switch. Moreover all moving parts of the switch are i ll protected.

A small shaft 5, which projects through the base 1, carries a plate ot insulating material 6 near one end thereof. An oj'ierating lever 7 is keyed to the opposite end ot the shaft 5. The insulatingl plate 6 is secured to the shaft 5 by means of set screws 8 and carries a plurality otcontact plates 9. The contact plates 9 are resiliently mounted on the insulating plate 6 and are adapted to engage sets of contact members 10 which are mounted on an insulating plate 11. Each plate 9 is secured to the plate 6 by means of two bolts 12, as shown in 2 of the drawing. The heads of the bolts 12 are formed flush with the surface of the contact plate 9 and collars 13 are suitably secured to the bolts on the opposite sides of the plate 6. Spring members 14 are located on the bolts 12 between the plate 9 and the plate G for exerting a force tending to hold the contact plate 9 towards the insulating plate 11. A limited amountot clearance is provided through the insulating plate 6 for the bolts 12. A guide pin l5 is secured to the insulating plate 6 and projects through a conical opening 1G in the contact plate E). The contact plates 9 are preferably composed o'f hardened steel.

rlhe insulating plate 11 is secured to lugs 17 which project from the base 1. The contact members 10 are in the form of bolts having` hardened steel heads 18 which are adapted to engage the contact plates 9. The bolts 1U project through the plate 11 and are held in position by means of nuts 19. The terminals ol the control system for operating a planer or other machine tool may be connected to the contact members 10. The Contact members 10 are arranged in sets of two each, as shown in Fig. 1 ot' the drawing. The set-s are disposed in circular arrangement and the contact members of each set are disposed on a radial line of such circular arrangement. `When the switch is in an olf position, the contact plates 9 are each located between two sets of contact members. Wlhen the shaft 5 is given a movement of rotation in one direction, the contact members on one side of each or" the contact plates are bridged and when the shaft is given a movement o1 rotation in an opposite direction, the contact members on the opposite side of each contact plate are bridged. The insulating plate 11 is held in position by means ot set screws 22 which engage lugs projecting` from the base 1.

Modifications in the switch and in the arrangement and location of parts may be made in the spirit and scope of my invention and such modifications are intended to be covered by the appended claims.

Vhat I claim is:

1. In a switch structure, the combination with a base member having a stationary plate of insulating material secured. to a. lug projecting therefrom, and six sets of contact members secured to and projecting through said plate, said sets of contact members being arranged radially in pairs about a circle with the contact members ot each pair located on the same radial line, of a short shaft projecting through said base, a second plate of insulating material secured to said shaft and located between said stationary plate and the base member, and a plurality of angitlarly spaced contact plates resiliently mounted on said second plate and disposed between said pairs of contact members, movement of .each contact plate in one direction serving to bridge one set of pairs of contact members and movement of each contact plate in the opposite direction serving to bridge another set oit pairs of Contact members.

2. ln a switch structure, the combination with. a base member havinga stationary plate of insulatingmaterial secured to 'a lug )rejecting` therefrom, and a plurality of sets ot Contact members projecting through and secured to said plate m circular arrangement, ot a short sha-ft projectingthrough and having a bearing in said basev member, a second plate of insulating mateL meeneem rial secured to said shaft and located between said stationary plate and the base member, said shaft being located in the center oi the circular arrangement of said contact members, a plurality of angularly spaced Contact plates resiliently mounted on said second plate, each of said Contact plates being,` located between two sets of contact members for bridging the Contact members of one set when the shaft is given a move ment of rotation in a forward or in a reverse direction, and a lever secured to said shaft adjacent to the base member for rotating such shaft to effect movement of the second insulating plate.

In testimony whereof, I hereto alix my signature.

HUBERT C. DEALE. 

